Determination of the Structural Features of a Long-Lived Electron-Transfer State of 9-Mesityl-10-methylacridinium Ion

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• 作者：Manabu Hoshino ; Hidehiro Uekusa ; Ayana Tomita ; Shin-ya Koshihara ; Tokushi Sato ; Shunsuke Nozawa ; Shin-ichi Adachi ; Kei Ohkubo ; Hiroaki Kotani ; Shunichi Fukuzumi
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：March 14, 2012
• 年：2012
• 卷：134
• 期：10
• 页码：4569-4572
• 全文大小：357K
• 年卷期：v.134,no.10(March 14, 2012)
• ISSN：1520-5126

文摘

Extensive efforts have been devoted to developing electron donor鈥揳cceptor systems that mimic the utilization of solar energy that occurs in photosynthesis. X-ray crystallographic analysis shows how absorbed photon energy is stabilized in those compounds by structural changes upon photoinduced electron transfer (ET). In this study, structural changes of a simple electron donor鈥揳cceptor dyad, 9-mesityl-10-methylacridinium cation (Acr⁺鈥揗es), upon photoinduced ET were directly observed by laser pump and X-ray probe crystallographic analysis. The N-methyl group in Acr⁺ was bent, and a weak electrostatic interaction between Mes and a counteranion in the crystal (ClO₄) was generated by photoinduced ET. These structural changes correspond to reduction and oxidation due to photoinduced ET and directly elucidate the mechanism in Acr⁺鈥揗es for mimicking photosynthesis efficiently.